1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* cache.c
*
* Save the reflection datablock to save having to recalculate it
*
* (c) 2007 Gordon Ball <gfb21@cam.ac.uk>
* Thomas White <taw27@cam.ac.uk>
*
* dtr - Diffraction Tomography Reconstruction
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "reflections.h"
#include "cache.h"
typedef struct struct_cacheheader {
char top[16];
int count;
double scale;
} CacheHeader;
ReflectionList *cache_load(const char *filename) {
FILE *f;
CacheHeader ch;
ReflectionList *reflectionlist;
size_t cachedreflection_size;
int i;
cachedreflection_size = sizeof(Reflection) - sizeof(Reflection *);
reflectionlist = reflectionlist_new();
f = fopen(filename, "rb");
if ( !f ) {
fprintf(stderr, "Couldn't open cache file\n");
}
if ( fread(&ch, sizeof(CacheHeader), 1, f) == 0 ) {
fprintf(stderr, "Couldn't read cache header\n");
fclose(f);
return NULL;
}
for ( i=0; i<ch.count; i++ ) {
Reflection *cr;
cr = malloc(sizeof(Reflection));
if ( fread(cr, cachedreflection_size, 1, f) == 0 ) {
fprintf(stderr, "Couldn't read reflections from cache\n");
fclose(f);
free(cr);
reflectionlist_clear(reflectionlist);
return NULL;
}
cr->next = NULL; /* Guarantee swift failure in the event of a screw-up */
//printf("reading (%f,%f,%f) i=%f (%d,%d,%d) %d\n",cr->x,cr->y,cr->z,cr->intensity,cr->h,cr->k,cr->l,cr->type);
reflection_add_from_reflection(reflectionlist, cr);
}
fclose(f);
return reflectionlist;
}
int cache_save(const char *input_filename, ReflectionList *reflectionlist) {
FILE *f;
CacheHeader ch;
Reflection *r;
int count;
const char top[16] = "DTRCACHE\0\0\0\0\0\0\0\0";
size_t cachedreflection_size;
char *cache_filename;
cache_filename = malloc(strlen(input_filename)+7);
strcpy(cache_filename, input_filename);
strcat(cache_filename, ".cache");
printf("Caching reflections to %s\n", cache_filename);
cachedreflection_size = sizeof(Reflection) - sizeof(Reflection *);
count = 0;
r = reflectionlist->reflections;
while ( r != NULL ) {
count++;
r = r->next;
};
f = fopen(cache_filename, "wb");
free(cache_filename);
if ( f == NULL ) {
printf("Couldn't save reflection cache\n");
return -1;
}
memcpy(&ch.top, &top, sizeof(top));
ch.count = count;
ch.scale = 0.; //temp, currently doesn't do anything
fwrite(&ch, sizeof(CacheHeader), 1, f);
r = reflectionlist->reflections;
while ( r != NULL ) {
fwrite(r, cachedreflection_size, 1, f); /* Write the reflection block, stopping just short of the "next" pointer */
r = r->next;
};
fclose(f);
return 0;
}
unsigned int cache_is_cachefile(const char *filename) {
FILE *fh;
CacheHeader ch;
size_t nread;
fh = fopen(filename, "rb");
if ( !fh ) {
printf("Couldn't open file '%s'\n", filename);
return 0;
}
nread = fread(&ch, sizeof(CacheHeader), 1, fh);
fclose(fh);
if ( nread != 1 ) {
return 0;
}
if ( strncmp(ch.top, "DTRCACHE", 8) == 0 ) {
return 1;
}
return 0;
}
|
